212101011201021 has 32 divisors (see below), whose sum is σ = 294304766722560. Its totient is φ = 135708609921024.

The previous prime is 212101011200989. The next prime is 212101011201133. The reversal of 212101011201021 is 120102110101212.

It is a happy number.

It is not a de Polignac number, because 212101011201021 - 2⁵ = 212101011200989 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212101011211021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13294461 + ... + 24514173.

It is an arithmetic number, because the mean of its divisors is an integer number (9197023960080).

Almost surely, 2^{212101011201021} is an apocalyptic number.

It is an amenable number.

212101011201021 is a deficient number, since it is larger than the sum of its proper divisors (82203755521539).

212101011201021 is a wasteful number, since it uses less digits than its factorization.

212101011201021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11221045.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 212101011201021 its reverse (120102110101212), we get a palindrome (332203121302233).

The spelling of 212101011201021 in words is "two hundred twelve trillion, one hundred one billion, eleven million, two hundred one thousand, twenty-one".